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Re: Horizontal dotted lines using PLOTS
I'm using IDL Version 5.1 on Windows NT 4, and see the same problem as
Oliver, when running his code. For what it's worth, I'm running 1024x768
in 8 bit colour, I don't know if that has a bearing on the problem.
Pavel Romashkin wrote:
> I have used the exact commands you provided, and I see perfect dashed
> lines on white background. No funny L-shaped dots.
> IDL Version 5.3 (MacOS PowerMac)
> Oliver Smith wrote:
> > Okay maybe I'm being too much of a perfectionist but this is really
> > annoying.
> > I use dotted lines to box an area of interest, line width is two pixels. A
> > solid white line is first plotted then a dotted black line plotted on top of
> > the first. A vertical line drawn this way looks great, but a horizontal line
> > is not so good; the dots that make up the black line are not square, but 'L'
> > shaped.
> > [ snip - snip ]
> > IDL Version 5.3.1 (Win32 x86). (c) 2000, Research Systems, Inc.
> > IDL> plot, findgen(100)
> > IDL> plots, [20,20], [10,80], linestyle = 0, color = 255, thick = 2, /data
> > IDL> plots, [20,20], [10,80], linestyle = 1, color = 0, thick = 2, /data
> > IDL> plots, [20,80], [10,10], linestyle = 0, color = 255, thick = 2, /data
> > IDL> plots, [20,80], [10,10], linestyle = 1, color = 0, thick = 2, /data
> > The horizontal line ends up looking very poorly defined if it is drawn on
> > top of a relatively light coloured background.
> > So can anyone reproduce this, and can anyone come up with a work-around
> > without changing the thickness of the lines?
> > Thanks,
> > Oliver Smith